EXHIBIT 21

                          SUBSIDIARIES OF REGISTRANT
                          --------------------------


                                         Place of      Percentage of Voting
Name of Subsidiary                     Organization      Securities Owned
- ------------------                     ------------      ----------------
                                                        
                                                        
First Financial Bankshares of             Delaware             100%
Delaware, Inc.                                                 
                                                               
First Financial Investments, Inc.          Texas               100%
                                                               
First National Bank of Abilene             Texas               100%*
Abilene, Texas                                                 
                                                               
Hereford State Bank                        Texas               100%*
Hereford, Texas                                                
                                                               
First National Bank, Sweetwater            Texas               100%*
Sweetwater, Texas                                              
                                                               
Eastland National Bank                     Texas               100%*
Eastland, Texas                                                
                                                               
The First National Bank in Cleburne        Texas               100%*
Cleburne, Texas                                                
                                                               
Stephenville Bank & Trust Co.              Texas               100%*
Stephenville, Texas                                            
                                                               
San Angelo National Bank                   Texas               100%*
San Angelo, Texas                                              
                                                               
Weatherford National Bank                  Texas               100%*
Weatherford, Texas
 
 *  By First Financial Bankshares of
    Delaware, Inc.


All subsidiaries are included in the consolidated financial statements of First
Financial.